Bobbin.



y PATENTED MAY 12, 1000.

B. GAUSE.

BOBBIN.

APPLIGMIoN FILED 0012.2, 1000.

hwentoz @7a/WW SCW @v ES PATENT OFFICE.

' WAMIINCTON, DISTRICT OF COLUMBIA, ASSIGNOR TO LEONIDAS B.

DOZIER, OF COLUMBIA, SOUTH CAROLINA.

BOBBIN.

Specification of Letters Patent.

Application filed October 2, 1906.

Patented May 12, 1908.

Serial No. 337,057.

To all whom it may concern:

Be it known that I, BENJAMIN GAUsn, of IVashington, in the District ofColumbia, haveinvented a certain new and useful Improvement in Bobbins;and I do hereby declare that the following is a full, clear, and exact'description thereof, reference being had to the accompanying drawings,in which- Figure l is a longitudinal section illustrating a manner ofmaking my bobbin;- Fig. 2 a perspective view of a bobbin, made inaccordance with my invention; and, Fig. 3 is a cross-section of areinforced bobbin.

The object of my invention is to provide a paper bobbin possessing theimportant characteristics of strength, durability, and economy ofmanufacture, and to provide a method of manufacturing' such a bobbin,and to these ends my invention consists in the bobbin, substantially ashereinafter specified and claimed.

In the carrying of my invention into practice, I form, in any desiredway, a cylindrical paper tube of uniform diameter, as, for example, bymeans of some tube-forming machine which winds or wraps paper upon asuitable core or mandrel, the tube being formed in this manner of anyconvenient length and cut up into the required length for the bobbin. Atone end, which is the bottom of the bobbin when on the spindle, thebobbin is provided with a collar or enlargement B which, in its outerend, is provided with radial notches t to engage the driving` lug or pinof the spindle, and at its upper end the bobbin is provided with aninternal collar C to reduce the diameter of the bobbin at the upper endto engage the spindle. Both collars B and C are also of paper, which maybe produced in the same manner as the tube, and they are applied to thetube A and the radial notches l) formed in the collar B in the followingmanner: The collar B, in the form of a short section of tubing or aring, is slipped over or placed upon the tube A at one end, and thecollar C, also in the vform of a short section of tubing or a ring, is

slipped in the other end of the tube A, The tube with the two collarsthus applied is placed in a clamp or holder D, whose internalconfiguration and size conform to the shape of the tube and the collar Bthereon, and thus held, pressure is applied in an end- Wise direction toboth ends of the tube A and the collars. For thus applying pressure, Iemploy a mandrel E having a diameter the same as the internal diameterof the tube A, except at one end, where it is reduced in diameter toagree with the internal diameter of the collar c, which mandrel ispassed longitudinally into the tube, so that a ring or collar F thereonengages the outer end of the paper ring or collar B, which projects ashort distance beyond the adjacent end of the tube A, and radial lugs orprojections f on said ring or collar F, by the continued longitudinalmovement of the mandrel, are forced into the paper ring or collar B, andthe end of the tube A forming in these parts the radial driving notchesb of the bobbin, and at the same time compressing the material of thecollar B endwise, and thereby causing it to be tightly or firmly allxedto the tube A, such allixing boing due to the fact that the material ofthe tube and collar is confined against any radial movement.

The inner end of the paper ring or collar B is supported by a shoulderon the clamp or holder D. The aper ring or collar C is allixed orattache( to the tube A in a similar manner, its inner end being engagedby a shoulder c on the mandrel E formed by reducing the diameter of theforward end 0f the mandrel, so that it passes through, but closely fits,the interior of the paper ring or collar C, and the outer end of saidring or collar and the adjacent end of the tube A are engaged by asecond mandrel G, which is given a longitudinal movement in the opposite direction to that of the mandrel E, so that the material of thering or collar C will be com iressed, endwise movement of such materiaiin a radial direction being prevented by the inclosing clamp or holderon the outside and the reduced end of the mandrel on the inside. Themandrel G has a central longitudinal opening for the reception of theprotruding end of the mandrel E, such end being pointed or tapered tofacilitate the passage of one mandrel over the other. The mandrel E needbe given only an endwise or longitudinal movement, in which event thering or collar F will be hxed thereto, but I preferably give it arotary, as well as a longitudinal movement, to thereby burnish or shapeor smooth the internal surfaces of the bobbin, as well as facilitate thewithdrawal of the mandrel from the bobbin after the a'llixingof thecollars B and C thereto, and

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with a rotary mandrel it is necessary that the pressure applying ring Fthereof be non-rotatable, an therefore, se arate from the mandrel.I/Vhen thus ma e separate from the mandrel, as far as rotation isconcerned, the ring or collar F is moved longitudinally to act upon thepaper collar B, and the tube A, as I have above described, by means ofan annular flange or enlargement e on the mandrel which acts upon saidring or collar E, and to avoid any likelihood of a rotary movement beingimparted to the ring or collar F balls e2 are interposed between theannular flange e and the end of the ring or collar F.

I have found that, by my invention, the collars B and C may be attachedto the bobbin with all necessary security, without the employment of anyfastening means, and solely by endwise compression of the paper, as Ihave described, so that the bobbins can be very cheaply manufactured;and it will be seen that in the case of the collar B, by one operation,the attachment of the collar to the bobbin and the formation of thedriving notches are simultaneously done. A highly important feature ofmy invention is the formation of the driving notches in the bobbin withabsolutely smooth or finished and hardened surfaces, there being noexposed or free paper fibers, such as are inevitable when the notchesare cut, the result being that the surfaces of the driving notches arecapable of resisting wear, and, regardless of the precise manner bywhich the notches are formed, I desire to cover this feature of myinvention, which consists in the provision on a paper bobbin of drivingnotches Whose surfaces are finished or hardened by the compression orcompacting of the material at the surface. Thus, if it should bepreferred, instead of forming the notches by compression simply, theycould be cut out and afterwards subjected to pressure to compact orcompress the surfaces thereof. The notches being formed in both thecollar B and the end of the tube A thereat, it will be evident that theformation of the notches in the manner I employ, will result in theinterlacing or overlapping to some degree of the contiguous portions ofthe stock or material of collar and tube, which of course adds to thestrength of the union between the collar B and the tube A.

It will be evident that from the pressure which the bobbin is subjectedto, by the action of the clamp or holderD and the mandrel E, the tube Awhich forms the body of the bobbin, and especially in those portionscontiguous to the collars, will be compressed or compacted radially, sothat the bobbin produced is of great hardness and strength. This isespecially so when the tube is formed by winding or wra ping so that itis composed of numerous ongitudinally extending strata or layers.

In the case of those bobbins, such, for emample, as are used forspinning, which have light or thin walls, so that, when made of paperthey do not possess sufficient stiffness or rigidity, they may bestiil'ened or reinforced by the application to the tube A of a band H ofsheet metal which is introduced into the tube while it is being formed.

Having thus described my invention, what I claim is :M

l. A bobbin having a body consisting of a tube of paper wound or wrappedupon itself, and having a collar also consisting of a tube of paper in adense or compressed state, the contacting surfaces of body and collarlbeing pressed together in intimate union, which union constitutes thesole attaching means of body and cellar.

2. A bobbin having a body 'consisting of a tube of paper wound orwrapped upon itself, and in a dense or compressed state, and having acollar also consisting of a tube of paper wound or wrapped upon itselfand in a dense or compressed state, the contacting surfaces of body andcollar being pressed together in intimate union, which union constitutesthe sole attaching means of body and collar.

3. A bobbin made of paper, wrapped or wound to form a tube, and astiflcning member wrapped between the layers of paper.

4. A bobbin made of paper having a notch for a driver, thedriver-engaging surfaces of the notch being compacted or compressed,whereby the fiber of the paper is preserved intact.

5. A bobbin having a body consisting of a tube of paper, and a collar atone end also consisting of a tube of paper concentric with the body,contiguous portions of the body and collar being indented to form adriverengaging notch, the indented surfaces being compressed orcompacted.

In testimony that I claim the foregoing I have hereunto set my hand.

BENJAMIN GAUSE.

lVitnesses:

Josnrnmn L. LAwLoR, CLYDE B. WEIKERT.

